If you need to cool a small room of 150 to 225 feet, experts and owners say the Frigidaire LRA074AT7 6,500-BTU window air conditioner is your best bet. Sold exclusively at Lowe's, this unit costs no more than the smaller-capacity Kenmore 70051 (*Est. $160), a 5,200-BTU model that can cool up to 150 square feet. However, experts say the Kenmore is actually the better buy for a very compact space since a too-powerful model would cycle on and off so often that it actually wastes power. An air conditioner that's too large can also leave a room feeling uncomfortably damp.
Like the Kenmore, the LRA074AT7 is Energy Star-rated, and reviews say its energy-saver mode really can shave a few dollars off your electricity bill. Remote control, sleep mode and a 24-hour timer are other perks. Experts and most owners find this air conditioner very quiet, but a few complain that the units they bought rattled. The only real weakness with the Frigidaire LRA074AT7 is that it does a poor job aiming airflow to the right.
The best feedback for the Frigidaire LRA074AT7 is at ConsumerReports.org, which includes it among the air conditioners it tests. A good selection of user reviews can be found at Lowes.com.
The Frigidaire LRA074AT7 is one of 43 window-mounted air conditioners tested here. Editors rate each for cooling ability, noise, ease of use, airflow and ability to run during a brownout.
Review: Air Conditioners Ratings, Editors of ConsumerReports.org
More than 250 owners review the Frigidaire LRA074AT7 here, and it earns an overall rating of 4.3 out of 5 stars. Those who like it say it cools well, is easy to set up and doesn't use too much electricity. But some complain that the units they bought make loud noises or don't cool well.
Review: Frigidaire 6500-BTU Window Room Air Conditioner (Energy Star), Contributors to Lowes.com, As of April 2012